What causes cancer-related pain?

[Borek]

What triggers the cancer related pain?

I did some reading about pain (mostly wikipedia) and nociceptors and I understand they react to several types of stimuli. Apparently mechanic and thermal stimuli are out of the question, that leaves us with some kind of chemical stimuli - but what it is?

Or is the mechanism of cancer related pain completely different?

 

[enosis_]

While not a valid response to your question, I read this recently.
http://www.cancer-pain.org/understanding/whatis.html

I would think there are at least 3 types of cancer pain. The first is the natural type brought about from the growth of the cells. The second would come from various treatments. The last, from the response to the treatments.

I think you've asked a very good question and look forward to responses.